Refactor: adding to every page the Metadata component.

[serapieTuyishime]

          can you make the page title as a component which will then handle everything within itself

Originally posted by @musayann in #1259 (comment)

[serapieTuyishime]

Currently, all the pages below have titles and some of them has <meta/> tags defined inside them , while it should be in the <Metadata/> component.

The task is to make all the pages use the Metadata component for title and meta tags.

• /src/layouts/Error.tsx
• /src/layouts/Redirecting.tsx
• /src/pages/achievements/[id].tsx
• /src/pages/bounties/[slug].tsx
• /src/pages/communities/[slug]/challenges/[challenge_id]/learning-modules/[id].tsx
• /src/pages/communities/[slug]/challenges/[challenge_id]/submissions/index.tsx
• /src/pages/communities/[slug]/challenges/[challenge_id]/index.tsx
• /src/pages/communities/[slug]/courses/[course_slug]/learning-modules/[id].tsx
• /src/pages/communities/[slug]/courses/[course_slug]/index.tsx
• /src/pages/communities/[slug]/scoreboard.tsx
• /src/pages/communities/index.tsx
• /src/pages/profile/[username]/index.tsx
• /src/pages/profile/index.tsx
• /src/pages/submissions/[submission_id].tsx
• /src/pages/login.tsx
• /src/pages/password-reset.tsx
• /src/pages/signup.tsx
• /src/pages/verify-email-update.tsx
• /src/pages/verify-email.tsx